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In cell reaction : Cu(s) +2Ag + (aq) ---->Cu 2+ (aq) +2Ag(s) Half cell reaction Cathode (reduction ): 2Ag + (aq) +2e - -----> 2Ag(s) Anode (oxidation) Cu(s) -----> Cu 2+ (aq) +2e - In overall reaction of the cell, silver electrode act as cathode and copper electrode act as anode.

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Electrochemistry

Short Answer Type

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235. Give an example of fuel cell.

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236. Write the symbolic notation for standard hydrogen electrode and its potential.

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237. What is a galvanic cell? What type of reactions give rise to electric current in a galvanic cell and how?

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238. What information is conveyed by the cell rotation given below?
Cu(s) | Cu²⁺ (aq) (0.1 M) || Ag⁺ (aq) (0.2 M) | Ag(s)

In cell reaction :

Cu(s) +2Ag⁺(aq) ---->Cu²⁺(aq) +2Ag(s)

Half cell reaction
Cathode (reduction ):
2Ag⁺(aq) +2e^- -----> 2Ag(s)

Anode (oxidation)
Cu(s) -----> Cu²⁺(aq) +2e^-
In overall reaction of the cell, silver electrode act as cathode and copper electrode act as anode.